Wireless client transaction systems and related methods

ABSTRACT

Embodiments of wireless client transaction systems are described herein. Other embodiments and related methods are also disclosed herein.

CROSS-REFERENCE TO RELATED APPLICATION

This patent application claims priority to U.S. Provisional Patent Application No. 61/665,853, filed on Jun. 28, 2012. The disclosure of the referenced application is incorporated herein by reference.

FIELD OF THE INVENTION

This invention relates generally to wireless identification technologies, and relates, more particularly, to wireless client transaction systems and related methods.

BACKGROUND

For the past several decades, credit cards have been the most popular form of payment at retail stores. Recently there has been a push by several credit card service providers, cellular service providers and software companies towards Near Field Communication (NFC) as an improved alternate to credit cards. NFC devices are purported to be more secure and more convenient to use, but most mobile phones today do not include NFC hardware, which adds cost and complexity to the design of mobile devices, and which has therefore not become ubiquitous in the market. Accordingly, NFC-based systems are constrained due to the lack of supported hardware in use by clients.

Therefore, a need exists in the art to develop mobile client identification systems and related methods that address such limitations of the current technology without imposing additional inconvenience or hardware upgrade costs to clients or consumers

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be better understood from a reading of the following detailed description of examples of embodiments, taken in conjunction with the accompanying figures in the drawings in which:

FIG. 1 illustrates a high-level overview of a transaction system for wireless clients, shown in the context of a business locale.

FIG. 2 illustrates a block diagram of the transaction system of FIG. 1 with respect to one embodiment thereof.

FIG. 3 illustrates a computer suitable for implementing an embodiment of at least a portion of the transaction system of FIG. 1.

FIG. 4 presents a representative block diagram of elements of the computer of FIG. 3.

FIG. 5 illustrates exemplary information contained by a registered customer set stored in a database of the transaction system of FIG. 1.

FIG. 6 illustrates a screen of a user interface of a point of service module of the transaction system, presenting a transaction option correlated to a first user to request or process a purchase transaction.

FIG. 7 illustrates a client screen of a wireless client, showing a payment confirmation request received by the wireless client wireless client 1310 from the point of service module, and presented to the first user to request a confirmation of payment for the purchase transaction presented to the user in FIG. 6.

FIG. 8 illustrates a screen of the user interface of the point of service module of the transaction system, presenting a second transaction option correlated to a second user to request or process a purchase transaction.

FIG. 9 illustrates a screen of the user interface of the point of service module of the transaction system, presenting both the first transaction option correlated to the first user and the second transaction option correlated to the second user for situations where both the first and second users are detected to be at a transaction area of the business locale proximate the point of service module.

FIG. 10 illustrates a Received Signal Strength (RSS) chart in map format for a reference device type, with respect to which one or more wireless clients can be localized by the transaction system at the business locale.

FIG. 11 illustrates the RSS chart in map format, with respect to which one or more wireless clients can be localized by the transaction system at the business locale.

FIG. 12 illustrates a flowchart for a method of providing the wireless transaction system.

FIG. 13 illustrates a flowchart for a method of transacting with wireless clients via the transaction system.

For simplicity and clarity of illustration, the drawing figures illustrate the general manner of construction, and descriptions and details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the invention. Additionally, elements in the drawing figures are not necessarily drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help improve understanding of embodiments of the present invention. The same reference numerals in different figures denote the same elements.

The terms “first,” “second,” “third,” “fourth,” and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms “include,” and “have,” and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, device, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, system, article, device, or apparatus.

The terms “left,” “right,” “front,” “back,” “top,” “bottom,” “over,” “under,” and the like in the description and in the claims, if any, are used for descriptive purposes and not necessarily for describing permanent relative positions. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in other orientations than those illustrated or otherwise described herein.

The terms “couple,” “coupled,” “couples,” “coupling,” and the like should be broadly understood and refer to connecting two or more elements or signals, electrically, mechanically or otherwise. Two or more electrical elements may be electrically coupled, but not mechanically or otherwise coupled; two or more mechanical elements may be mechanically coupled, but not electrically or otherwise coupled; two or more electrical elements may be mechanically coupled, but not electrically or otherwise coupled. Coupling (whether mechanical, electrical, or otherwise) may be for any length of time, e.g., permanent or semi-permanent or only for an instant.

“Electrical coupling” and the like should be broadly understood and include coupling involving any electrical signal, whether a power signal, a data signal, and/or other types or combinations of electrical signals. “Mechanical coupling” and the like should be broadly understood and include mechanical coupling of all types. The absence of the word “removably,” “removable,” and the like near the word “coupled,” and the like does not mean that the coupling, etc. in question is or is not removable.

SUMMARY

Credit cards and NFC devices cover two ends of the payments spectrum. There is a middle ground that has not been explored much to date. The present disclosure explores this middle ground, allowing mobile phones to be used for contactless payments at retail stores, without requiring them to be equipped with NFC hardware. The proposed approach leverages existing radio on mobile phones, including WiFi (IEEE 802.11a/b/g/n), WiPAN (IEEE 802.15) such as Bluetooth®, and/or cellular data (W-CDMA, HSPA, EDGE, WiMAX, LTE, etc.). Almost all phones today are equipped with one or more of these radio technologies, and by fingerprinting the radio signal profile passively via access points at a Point of Service (POS), it is possible to passively localize the mobile phone without imposing an additional hardware or software requirements. The systems and methods described herein permit a POS module to know when the client's mobile phone is close to it and ready for a transaction, such as a payment transaction, without requiring specialized NFC hardware technology.

The present disclosure describes wireless client transaction systems and methods for identifying users at transaction areas within a business locale, using passive radio fingerprinting of the users' respective wireless clients. As used herein, the term wireless client can refer to personal wireless mobile devices comprising, for example, cellular phones, smartphones, and/or tablet devices. Such transaction systems may be implemented via dedicated hardware and/or via software running on devices such as wireless access points, laptops. PCs, tablets, phones, or a combination of hardware and software on multiple devices and radios. In some examples, communication for the systems and methods herein can be implemented via WiFi (IEEE 802.11). In the same or other examples, other wireless technologies can be used, as described above.

A high-level overview of transaction system 1000 is shown in FIG. 1, in the context of business locale 1900, where at least part of transaction system 1000 is located at or proximate to transactional area 1910 of business locale 1900. Transaction system 1000 relies on radio 1710 (WiFi, WiPAN, cellular, etc.) to passively scan for wireless packets of wireless clients 1300. Upon finding such wireless packets, transaction system 1000 checks if they come from wireless client(s) 1300 of registered user(s) of wireless transaction system 1000. Such assessment can be made, for example, based on the hardware address (MAC addresses, device unique identifiers, etc.) of the wireless client(s) 1300 of the users. Transaction system 1000 can then determine, based on the signal strength of received wireless packets of wireless client(s) 1300, if the registered user of wireless client 1310 is within transaction area 1910 and/or proximate to POS module 1100. Upon detecting such a situation, transaction system 1000 can identify and/or greet the user of wireless client 1310 with a transaction option correlated to wireless client 1310, such as a transaction option for the user to pay via wireless client 1310.

In some examples, when the user chooses such transaction option, transaction system 1000 can send a confirmation message (text message, push notification, etc.) to wireless client 1310, prompting the user respond to the message by supplying a password, such as a personal identification number (PIN). Upon receiving the response from the user of wireless client 1310 and verifying the password, transaction system 1000 can then process and/or proceed to finalize the transaction.

In some situations, if transaction system 1000 determines that multiple wireless clients 1300 are located within transaction area 1910 and/or proximate to POS module 1100, POS module 1000 can present multiple respective transaction options correlated to the respective multiple wireless clients 1300. Accordingly, the appropriate user wishing to carry out the transaction can choose the proper transaction option correlated thereto, and confirm the transaction with his/her password.

The security of wireless transaction system 1000 thus remains assured provided that (1) the user does not lose his/her registered wireless client, and (2) the user's password does not get compromised. If one of the two assumptions is broken, the wireless transaction system 1000 still remains secure.

DETAILED DESCRIPTION

In one embodiment, a system and/or an apparatus can comprise a client ID module and a localization module. The client module can be configured to (a) scan a wireless channel set at a business locale for wireless signals of a registered customer set, to (b) identify, out of the wireless signals, first wireless packets of a first client of the registered customer set; and to (c) calculate a first client signal strength of the first wireless packets. The localization module can be configured to calculate whether the first client is at a transaction area of the business locale based on the first client signal strength and without reliance on NFC technology.

In one example, a method for transacting with wireless clients can comprise (a) scanning, via a scanning module, a wireless channel set at a business locale for wireless signals of a registered customer set, (b) identifying via the scanning module, out of the wireless signals, first wireless packets of a first client of the registered customer set, (c) calculating, via the scanning module, a first client signal strength of the first wireless packets; and (d) calculating, via a localization module, whether the first client is at a transaction area of the business locale based on the first client signal strength and without reliance on NFC technology.

In one example, a method comprise providing a client ID module, and providing at least one of a training module or a point of service module. The client ID module can comprise a scanning module and a localization module. The client ID module can be configured to (a) scan a wireless channel set at a business locale for wireless signals of a registered customer set; (b) identify, out of the wireless signals, first wireless packets of a first client of the registered customer set; and (c) calculate a first client signal strength of the first wireless packets. The localization module can be configured to calculate whether the first client is at a transaction area of the business locale based on the first client signal strength and without reliance on NFC technology. The training module can be configured to generate a first signal strength chart of a portion of the business locale for a first reference device type, against which first signal strength chart the localization module can compare the first client signal strength to locate the first client. The POS module can be configured to present, at the transaction area, a user interface comprising a first transaction option correlated to the first client based on the calculation by the localization module of whether the first client is at the transaction area.

Other examples and embodiments are further disclosed herein. Such examples and embodiments may be found in the figures, in the claims, and/or in the present description.

FIG. 2 illustrates a block diagram of the transaction system 1000 introduced above in FIG. 1, with respect to one embodiment thereof. Transaction system 1000 comprises client identification (ID) module 2210, which includes scanning module 2210 and localization module 2220 in the present example. Scanning module 2210 is configured to identify the presence of one or more wireless clients 1300 (FIG. 1), and Localization module 2220 is configured to determine a location of such wireless clients 1300 within business locale 1900. Transaction system 1000 also comprises POS module 1100, which is configured to interface with users 1400 of wireless clients 1300 at transactional area 1910 (FIG. 1) based on wireless client information determined by client ID module 1200. The present embodiment also comprises training module 2300, which is configured to measure environment fingerprint information about business locale 1900 with respect to reference wireless clients, where such environment fingerprint information can be later used by client ID module 1200 to locate individual ones of wireless clients 1300 at business locale 1900 (FIG. 1). Although FIG. 2 illustrates client ID module 1200 and POS module 1100 as distinct from each other, there can be embodiments where such modules can be part of each other and/or coupled together as seen in FIG. 1. In addition, there can also be other embodiments where training module 2300 can be optional and/or detached from client ID module 1200.

In some examples, at least part of transaction system 1000, such as scanning module 2210 and/or localization module 2220, can be implemented via computing device 1700. (FIG. 1) Computing device 1700 comprises a desktop computer in the present example, but there can be other examples where computing device 1700 can comprise a laptop computer, a notebook computer, a tablet computer, and/or other computing devices with wireless functionality. The wireless functionality of computing device 1700 can comprise radio 1710 operating pursuant to the WiFi standard (IEEE 802.11) such as in the present embodiment, but can also be based on other standards such as Bluetooth® or WPAN (IEEE 802.15), and/or cellular standards like W-CDMA, HSPA, EDGE, WiMAX, and/or LTE, among others. It is understood that additional and/or alternate hardware, radio technologies, and/or operating systems may be utilized within the scope of this disclosure.

WiFi usage on modern wireless clients such as smartphones is growing rapidly, and most smartphones include WiFi radio hardware to connect to wireless access points. Since the current trend is for cellular data plans to move from unlimited to limited and tiered bandwidth usage, it is expected that WiFi will continue to be popular on smartphones in the future.

FIG. 3 illustrates a computer 900 suitable for implementing an embodiment of computing device 1700. Computer 900 includes a chassis 902 containing one or more circuit boards (not shown), a USB (universal serial bus) port 912, a Compact Disc Read-Only Memory (CD-ROM) and/or Digital Video Disc (DVD) drive 916, and a hard drive 914. A representative block diagram of the elements included on the circuit boards inside chassis 902 is shown in FIG. 4. A central processing unit (CPU) 1010 is coupled to a system bus 1014 in FIG. 4. In various embodiments, the architecture of CPU 1010 can be compliant with any of a variety of commercially distributed architecture families.

System bus 1014 also is coupled to memory 1008 that includes both read only memory (ROM) and random access memory (RAM). Non-volatile portions of memory 1008 or the ROM can be encoded with a boot code sequence suitable for restoring computer 900 (FIG. 3) to a functional state after a system reset. In addition, memory 1008 can include microcode such as a Basic Input-Output System (BIOS). In the depicted embodiment of FIG. 4, various I/O devices such as a disk controller 1004, a graphics adapter 1024, a video controller 1002, a keyboard adapter 1026, a mouse adapter 1006, a network adapter 1020, and other I/O devices 1022 can be coupled to system bus 1014. Keyboard adapter 1026 and mouse adapter 1006 are coupled in the present example to keyboard 904 and mouse 910, respectively, of computer 900. While graphics adapter 1024 and video controller 1002 are indicated as distinct units in FIG. 4, video controller 1002 can be integrated into graphics adapter 1024, or vice versa in other embodiments. Video controller 1002 is suitable for refreshing monitor 906 to display images on a screen 908 of computer 900. Disk controller 1004 can control hard drive 914, USB port 912, and/or CD-ROM or DVD drive 916. In other embodiments, distinct units can be used to control each of these devices separately.

Network adapters 1020 can be coupled to one or more antennas. In some embodiments, network adapter 1020 can be configured for WiFi communication (IEEE 802.11), and/or may be part of a WNIC (wireless network interface controller) card (not shown) plugged or coupled to an expansion port (not shown) in computer 900. Such WNIC card can be a wireless network card built into internal computer 900 in some examples. A wireless network adapter can be built into internal client computer 900 by having wireless Ethernet capabilities integrated into the motherboard chipset, or implemented via a dedicated wireless Ethernet chip, connected through the PCI (peripheral component interconnector) or a PCI express bus. In the same or other embodiments, network adapters 1020 can be configured for communication via other wireless protocols, such as via WPAN (IEEE 802.15), and/or via cellular data like W-CDMA, HSPA, HSPA+, EDGE, WiMAX. LTE, or others. In other embodiments, network adapter 1020 can be a wired network adapter.

Although other components of computer 900 are not shown, such components and their interconnection are well known to those of ordinary skill in the art. Accordingly, further details concerning the construction and composition of computer 900 and the circuit boards inside chassis 902 need not be discussed herein.

When computer 900 is in operation, program instructions stored on hard drive 914, on memory 1008, on a USB drive in USB port 912, and/or on a CD-ROM or DVD in CD-ROM and/or DVD drive 916, can be executed by CPU 1010 (FIG. 10). Such program instructions may correspond to an operating system (OS) such as a Microsoft Windows (OS), an Apple iOS OS, a Linux OS, and/or an Android OS, among others. A portion of such program instructions can be suitable for implementing or carrying out the systems and methods described herein.

Backtracking to FIGS. 1-2, client ID module 1200 comprises scanning module 2210, which is configured to passively scan wireless channel set 1600 at business locale 1900 for wireless signals from wireless clients 1300 of registered customer set 2251, and to identify, out of such wireless signals, wireless packets of respective wireless clients 1300 of registered customer set 2251. Registered customer set 2251 can be a list or data structure with information about customers that have registered for service from transaction system 1000, and can be accessed by scanning module 2210 from database 2250 either locally or remotely, such as via the Internet. FIG. 5 illustrates an example of information contained by registered customer set 2251 as stored in database 2250.

In the present example, with respect to FIG. 1, scanning module 2210 can scan wireless channel set 1600 for wireless signals of wireless clients 1300, and can detect wireless packets 1311 from wireless client 1310 of user 1410, wireless packets 1321 from wireless client 1320 of user 1420, and wireless packets 1331 from wireless client 1330 of user 1430. For purposes of the present example, users 1410 and 1420 have signed up their respective wireless clients 1310 and 1320 for service from transaction system 1000, but user 1430 has not. Accordingly, as seen in FIG. 5, client ID information 510 for wireless clients 1310 and 1320 of respective users 1410 and 1420 exists at database 2250 as part of registered customer set 2251, but not for wireless client 1330 of user 1430. Scanning module 2210 can thus compare data from wireless packets 1311, 1321, and 1331 against client ID information 510 of registered customer set 2251 to thereby identify that wireless clients 1310 and 1320 belong to registered customer set 2251 and have registered for service, and that wireless client 1330 has not.

While scanning wireless channel set 1600, scanning module 2210 can set a radio driver for radio 1710 to a passive listening mode (e.g., “monitor” or “pseudo IBSS”), and/or to a promiscuous mode to scan for wireless packets from wireless clients 1300. With respect to WiFi, an example of such passive listening mode configuration can be the “monitor” mode supported by Intel® wireless chipset radios using the “iwlwifi” drivers, and the “pseudoIBSS” mode supported by Atheros® chipset radios using the “madwifi” drivers. In such passive listening mode, the WiFi radio does not associate to any wireless access point, but can be set to listen on any frequency/channel. Channel set 1600 supports 11 channels (from 1 to 11) in the 2.4 GHz frequency spectrum for WiFi 802.11 b/g, and support several channels in the 5 Ghz spectrum (the exact channels supported varies between countries) for WiFi 802.11a. Radio 1710 can be set to monitor one or more of these WiFi channels as part of wireless channel set 1600, and can receive wireless packets that any of wireless clients 1300 transmits on such channel(s).

In some examples, scanning module 2210 can use a packet capture library, such as the Linux libpcap library, and may activate a callback module every time a new wireless packet from wireless clients 1300 is received. Such callback module of scanning module 2210 can read the packet for client statistics 2215, including a received signal strength (RSS), transmission rate, frequency, and/or length, and can record such client statistics 2215 in a data structure such as a hash table. In some examples such data structure for client statistics 2212 can be stored at database 2250.

As seen in FIG. 2, radio 1710 is coupled in the present embodiment to switching module 2230, which is configured to cause the radio driver for radio 1710 to switch between the different channels of wireless channel set 1600. Due to the switching provided by switching module 2230, scanning module 2210 can gather information from the wireless packets sent by wireless clients 1300 amongst the different frequency channels of wireless channel set 1600. In order to monitor as many wireless packets as possible, switching module 2230 can be set to rapidly switch between all the possible channels of wireless channel set 1600. Channel switching incurs latency, so it can be important to choose the most likely channels that wireless clients 1300 may transmit through. With respect to WiFi, out of the 11 possible 802.11 b/g channels, only 3 are non-overlapping (1, 6 and 11), and thus most wireless access points are set up on one of these three channels. Accordingly, switching module 2230 can be configured to focus on non-overlapping channels by, for example, scanning them more repeatedly than other wireless channels. In the same or other examples scanning module 2210 can be configured to determine, via the switching provided by switching module 2230, which channels of wireless channel set 1600 are currently high-traffic channels for wireless clients 1300 of registered customer set 2251 at business locale 1900. Once such high-traffic channels are determined, scanning module can be configured to scan, via the switching provided by switching module 2230, each channel of wireless channel set 1600 in a probabilistic weighted order where the high-traffic channels are scanned for the wireless signals more repeatedly than lower-traffic channels of wireless channel set 1600. Alternatively, the scanning module 2210 could employ multiple radios, each scanning on different non-overlapping sets of frequency channels.

The wireless packets received by scanning module 2210 can be subdivided into several portions according to the packet structure designated by their corresponding wireless protocol. Scanning module 2210 can extract packet header information from the wireless packets of wireless clients 1300. Accordingly, whether for WiFi or other wireless communication protocols, scanning module 2210 can be configured to extract client identifier information from the packet headers of wireless packets it receives. For example, scanning module 2210 can parse wireless packets 1311 of wireless client 1310 to extract client identifier 13111 therefrom, and can then identify wireless client 1310 as pertaining to registered customer set 2251 by comparing client identifier 13111 against client ID information 510 (FIG. 5) from registered customer set 2251 in database 2250. In some examples, scanning module 2210 can scan for wireless packets 1311, and/or parse wireless packets 1311, based on a WiFi IEEE 802.11 packet structure, a WPAN IEEE 802.15 packet structure, and/or based on a cellular data packet structure. In the same or other examples, client identifier 13111 can comprise at least one of a Media Access Control (MAC) address or an Extended Unique Identifier (EUI) address.

Having identified wireless client 1310 based on wireless packets 1311 as described above, the presence of wireless client 1310 within business locale 1900 is thus established. Scanning module 2210 can also determine other information, statistics, or meta-data from wireless packets 1311 about wireless client 1310 to assist in locating wireless client 1310 within business locale 1900. In some examples, such meta-data can comprise a client device type of wireless client 1310, where such client device type can comprise information such as a type, brand, and/or model of the wireless client 1310. For instance, based on client identifier 13111 extracted from wireless packets 1311, scanning module 2210 can cross-reference registered customer set 2251 (FIG. 5) for the corresponding entries for wireless client 1310, and thus extract therefrom client device type information 530 for wireless client 1310.

In the same or other examples, the meta-data determined by scanning module 2210 from wireless packets 1311 can comprise a bitrate for wireless packets 1311, a frequency channel for wireless packets 1311, and/or a received signal strength (RSS) for wireless packets 1311 of wireless client 1310. The RSS can be calculated by scanning module 2210 while monitoring from wireless packets 1311, and can be a good indicator of the proximity of corresponding wireless client 1300 to scanning module 2210 and/or to transactional area 1910 at business locale 1900.

Transaction system 1000 (FIGS. 1-2) comprises localization module 2220 configured to determine the location of wireless clients 1300 identified by scanning module 2210. For example, localization module 2220 can calculate whether wireless client 1310 is located at transaction area 1910 of business locale 1900 based on the RSS calculated by scanning module 2210 for wireless packets 1311. In one simplified implementation, localization module 2220 can compare the RSS for the different wireless clients 1300 at business locale 1900, and ascertain that the one with the greatest RSS is likely to be located closest to radio 1710 and thus located at transaction area 1910. Other localization techniques are further described below. Localization module 2220 can thus calculate such location of wireless client 1310 and/or the location of other ones of wireless clients 1300 without reliance on NFC technology, such that transaction system 1000 can be made accessible to wireless clients 1300 without requiring them to have NFC hardware or software.

Transaction system 1000 further comprises POS module 1100, which is configured to present user interface 1110 at transaction area 1910 of business locale 1900. FIG. 6 illustrates screen 6500 of user interface 1110, which can be presented to a user to process a purchase transaction. For example, once wireless client 1310 has been identified by scanning module 2210 as being present at business locale 1900, and when localization module 2220 has located wireless client 1310 as being at transaction area 1910 of business locale 1900 as described above, user interface screen 6500 can be presented with one or more transaction options 6510, including transaction option 6511, to process a purchase transaction. In the present example, transaction option 6511 is correlated to wireless client 1310 based on the above-described assessment by localization module 2220 that wireless client 1310 is located at transactional area 1910. Accordingly, transaction option 6511 can identify user 1410 (FIG. 1) by name or username, and can provide an alternative to user 1410 to “pay by phone” via wireless client 1310 rather than by credit card or cash.

Upon selection of transaction option 6511 by user 1410, POS module 1100 can emit a payment confirmation request to wireless client 1310. FIG. 7 illustrates client screen 7500, which shows payment confirmation request 7510 received by wireless client 1310 and presented thereat to user 1410 to request confirmation of payment for the transaction presented to user 1410 at screen 6500 of user interface 1110 (FIG. 6). In some examples, payment confirmation request 7510 can be sent to wireless client 1310 in the form of a text message, such as an SMS (Short Message Service) message, that can be displayed by wireless client 1310. In the same or other examples, payment confirmation request 7510 can be sent to an application or other software installed on wireless client 1310 and configured to present confirmation request 7510 to user 1410 and to request payment authentication 7520.

After receiving payment confirmation request 7510, user 1410 can accept the transaction by entering his or her user password as payment authentication 7520. Payment authentication 7520 is then sent by wireless client 1310, received wirelessly by POS module 1100, and, if the user password is correct, POS module 1100 can proceed to carry out the transaction by billing the account of user 1410. In the present embodiment, the user password received via payment authentication 7520 can be authenticated by POS module 1100 via comparison with a reference password previously entered by user 1410 for its account with transaction system 1000 (FIG. 1). The reference password can be stored, correlated to wireless client 1310, at registered customer set 2251 for access by POS module 1100 via database 2250 in some embodiments. In the same or other embodiments, payment method information, such as credit card or bank account information, can also be stored correlated to wireless client 1310 at registered customer set 2251 so that POS module 1100 can bill the account of user 1410 accordingly upon receipt of payment authentication 7520.

In some instances, more than one of wireless clients 1300 can be located at business locale 1900 (FIG. 1). For instance, wireless clients 1310 and 1320 could be both located at or close to transactional area 1910. In such situations, scanning module 2210 (FIG. 2) can be configured to identify wireless packets 1311 of wireless client 1310 and wireless packets 1321 of wireless client 1320, and to calculate the RSS for wireless packets 1311 and 1321 (FIG. 1). Localization module 2220 can then compare the RSS of wireless packets 1311 against the RSS of wireless packets 1321. Based on such comparison, if localization module 2220 determines that the RSS of wireless packets 1311 of wireless client 1310 is greater than the RSS of wireless packets 1321 of wireless client 1320, POS module 1100 can proceed to present transaction option 6511 at user interface 1110 for user 1410 as shown in screen 6500 of FIG. 6. To the contrary, if localization module 2220 determines that the RSS of wireless packets 1321 of wireless client 1320 is greater than the RSS of wireless packets 1311 of wireless client 1310, POS module 1100 can proceed to present transaction option 8511 at user interface 1110 for user 14200 as shown in screen 8500 of FIG. 8.

There can be situations where more than one of wireless clients 1300 can be located within transaction area 1910, or be sufficiently close to each other, in such a way that localization module 2220 may have problems distinguishing which of users 1400 is at or closer to user interface 1110 (FIGS. 1-2). For instance, if wireless clients 1310 and 1320 were next to each other within transaction area 1910, the RSS calculated by scanning module 2210 for wireless packets 1311 of wireless client 1310 could be similar to the RSS calculated by scanning module 2210 for wireless packets 1321 of wireless client 1320. In such a situation, localization module 2220 may not be able to properly ascertain which RSS is greater with a minimum degree of certainty. Localization module 2220 may thus not be able to determine whether to present transaction option 6511 (FIG. 6) correlated to wireless client 1310 and user 1410 (FIG. 1), or to present transaction option 8511 (FIG. 8) correlated to wireless client 1320 and user 1420 (FIG. 1). In such circumstances, as seen in FIG. 9, POS module 1100 may present screen 9500 comprising transaction option 6511 for user 1410 to self-identify with respect to wireless client 1310, and comprising transaction option 8511 for user 1420 to self-identify with respect to wireless client 1320.

Transaction system 1000 can be configured in some implementations to generate aggregate statistics from the wireless packets of wireless clients 1300, and to locate individual ones of wireless clients 1300 based on such aggregate statistics. For example, localization module 2220 can be configured to generate aggregate statistics for wireless client 1310 based on wireless packets 1311, including an aggregate RSS of wireless packets 1311 of wireless client 1310 throughout a latest time period.

In some examples, the aggregate RSS of wireless packets 1311 can comprise at least one of a signal strength mean, a signal strength variance, a signal strength median, and/or a signal strength quartile. In the same or other examples, the aggregate statistics for wireless client 1310 can comprise a number of frequency channels used for wireless packets 1311 throughout the latest time period, and/or a number of wireless packets 1311 transmitted throughout the latest time period. Localization module 2220 can also be configured to generate aggregate statistics for wireless client 1302 based on wireless packets 1321, including an aggregate RSS of wireless packets 1321 for the latest time period.

Such aggregation can normalize the statistics calculated by scanning module 2210 from the wireless packets of wireless clients 1300, where such statistics could otherwise vary per individual wireless client in response to, for example, interference or movement within business locale 1900 relative to radio 1710, scanning module 2210, and/or POS module 1100. Thus, the aggregation of statistics can permit the generation of more stable and less noisy RSS values with respect to which localization module 2220 can more reliably ascertain the location of wireless clients 1300 at business locale 1900. Such aggregation can be made throughout a latest time period, which can be of approximately 2 seconds in some implementations, and which can repeat periodically. For instance, if the RSS statistics for wireless packets 1311 of wireless client 1310 do not change significantly throughout the latest time period of aggregation, localization module 2220 can ascertain that wireless client 1310 is not moving within business locale 1900.

In some examples, the aggregate statistics for wireless client 1310 can be based on a time-weighted standard where, with respect to the latest time period, later statistics measured or generated from later ones of wireless packets 1311 are weighted more heavily than earlier statistics measured or generated from earlier ones of wireless packets 1311.

In embodiments where transaction system 1000 aggregates statistics as described above, POS module 1100 can be configured to present transaction option 6511 (FIG. 6) correlated to wireless client 1310 if the aggregate RSS of wireless packets 1311 is greater than the aggregate RSS of wireless packets 1321 by at least a minimum signal strength threshold difference, and/or if the aggregate RSS of wireless packets 1311 is greater than a minimum signal strength threshold value. Similarly, POS module 1100 can be configured to present transaction option 8511 (FIG. 8) correlated instead to wireless client 1320 if the aggregate RSS of wireless packets 1321 is greater than the aggregate RSS of wireless packets 1311 by at least the minimum signal strength threshold difference, and/or if the aggregate RSS of wireless packets 1321 is greater than the minimum signal strength threshold value.

As seen in FIG. 2, transaction system 1000 can also optionally comprise training module 2300, which is configured to measure and generate reference environment information with respect to fingerprints of reference wireless devices at business locale 1900. Such reference environment information an be later used to assist client ID module 1200 in locating wireless clients 1300 within business locale 1900.

One approach for client localization in transaction system 1000 can be to generate one or more received signal strength (RSS) charts with training module 2300 with respect to stochastic distributions for wireless signals transmitted under different conditions from several locations in the area of business locale 1900. In some examples, the RSS charts can be conceptualized in terms of a table format and/or a map format. FIG. 10 illustrates RSS chart 10000 in map format 10100 for reference device type 10510 at business locale 1900. FIG. 11 illustrates RSS chart 10000 in table format 11100 for reference device type 10510 at business locale 1900.

The RSS charts can be constructed based on vectors of RSS measurements correlated to a specific locations and/or to specific conditions of corresponding wireless packets from a reference device type. The reference device type can relate to a specific type (cellular phone, smartphone, tablet, etc), brand, and/or model of wireless device for which the RSS chart is built. In some examples, the RSS vectors can be similar to the following: <location, reference device type, bit rate, frequency channel, packet size, RSS>, where such RSS vector specifies an RSS measured for a wireless packet received from a location within business locale 1900, transmitted from a reference device type at a specific bitrate, frequency channel, and packet size.

Data for the RSS vectors can be generated or captured by scanning module 2210 in some implementations from wireless packets of one or more reference wireless devices, and fed to training module 2300 to construct the RSS charts. For instance, FIG. 10 shows RSS chart 10000 in map format 10100, with a layout of business locale 1900 comprising different locations thereat, such as transaction area 1920, queue area 1920 and entrance area 10930. Reference wireless packets 10511 from reference device type 10510 can be originated from different locations of business locale 1900, and processed by training module 2300 to generate RSS vectors therefor with respect to desired ones of the different locations. For instance, reference wireless packets 10511 originated from transaction area 1910 are processed by training module to generate RSS vectors 10911, reference wireless packets 10511 originated from queue area 1920 are processed by training module to generate RSS vectors 10921, and reference wireless packets 10511 originated from entrance area 110930 are processed by training module to generate RSS vectors 109131. FIG. 11 illustrates a subset of corresponding RSS vectors 10911, 10921, and 10931 described above with respect to FIG. 10 under different bitrate, frequency channel, and packet size conditions. In the present example, as seen in FIG. 11, reference device type 10510 comprises an iPhone® 5 from Apple® Corporation. Other RSS charts similar to RSS chart 10000 can be generated for other reference device types with respect to locations 1910, 1920, and 10930 if desired. RSS charts need not be tied to specific device models. For instance, more generic RSS charts may be generated for a generic device type (tablets, cellular phone, smartphones), for devices of a specific wireless carrier (AT&T, Verizon, Sprint, etc.), for devices of a specific wireless technology (WiFi, WPAN, W-CDMA, HSPA, EDGE, WiMAX, LTE, etc.), and/or for devices of a specific brand, among others.

With the RSS charts generated by training module 2300, localization module 2220 can cross-reference what the RSS of a wireless client that corresponds to reference device type 10510 is supposed to be like with respect to the different locations within business locale 1900. Accordingly, with respect to FIG. 1, localization module 2220 can ascertain that, if the RSS of wireless packets 1311 of wireless client 1310 correlates to the RSS of one of RSS vectors 10911 in RSS chart 10000 (FIG. 11) for a corresponding bitrate, frequency channel, and/or packet size, then wireless client 1310 is likely to be located at transaction area 1910.

Considering the above, training module 2220 (FIG. 2) is configured to generate RSS chart 10000 of a portion of business locale 1900 for reference device type 10510, as seen in FIGS. 10-11. RSS chart 10000 can be generated with respect to reference signal strengths 11150 (FIG. 11), which can be determined by scanning module 2210 from reference wireless packets 10511 (FIG. 10) of reference device type 10510. Reference wireless packets 10511 comprise nearby reference wireless packets 105111, which are transmitted by reference device type 10510 from nearby reference location 1810. Reference wireless packets 10511 also comprise distant reference wireless packets 105112, which are transmitted from reference device type 10510 at distant reference location 1820. Reference signal strengths 11150 (FIG. 11) comprise nearby reference signal strengths 11151, which are calculated by scanning module 2210 from nearby reference wireless packets 105111 (FIG. 10). Reference signal strengths 11150 (FIG. 11) also comprise distant reference signal strengths 11152, which are calculated by scanning module 2210 from distant reference wireless packets 105112 (FIG. 10). In the present example, nearby reference location 1810 corresponds to transaction area 1910, which is nearby to radio 1710 through which reference wireless packets 10511 are received by transaction system 1000 for processing by scanning module 2220. Distant reference location 1820 corresponds to queue area 1920, which is more distant with respect to radio 1710. In other implementations, other areas of business locale 1900 can correspond to nearby reference location 1810 and/or distant reference location 1820.

Once RSS chart 10000 is generated by training module 2300, it can be stored for future access by localization module 2220 when determining the localization of wireless clients 1300 (FIG. 1). In some examples, RSS chart 10000 (FIGS. 10-11) can be stored at database 2250 (FIG. 2). With respect to the example of FIG. 1, to localize wireless client 1310 within business locale 1900, scanning module 2220 (FIG. 2) would first identify wireless client 1310 (FIG. 1) as being present within business locale 1900, and would determine the RSS and other information or meta-data from wireless packets 1311 as described above. Localization module 2220 (FIG. 2) could then compare such information about wireless packets 1311 of wireless client 1310 against RSS chart 10000 (FIGS. 10-11). For instance, in some implementations, localization module 2220 can compare the RSS of wireless packets 1311 (FIG. 1) against reference signal strengths 1150 (FIG. 11) that correspond to the reference device type, bitrate, frequency channel, and/or packet size of wireless packets 1311. As an example, if the RSS from wireless packets 1311 (FIG. 1) corresponds to one of nearby reference signal strengths 11151 (FIG. 11), localization module 2220 can ascertain that the location of wireless client 1310 is likely to be at transaction area 1910 (FIG. 1). As another example, if the RSS from wireless packets 1311 (FIG. 1) corresponds to one of distant reference signal strengths 11152 (FIG. 11), localization module 2220 can ascertain that the location of wireless client 1310 is likely to be at queue area 1920 (FIG. 1).

As described above, training module 2300 can also be configured to generate other RSS charts for different reference device types. Thus, besides RSS chart 10000 for reference device type 10510 (FIGS. 10-11), training module 2300 can generate a second RSS chart similar to RSS chart 10000 but for a second reference device type. Thus, if the client device type of wireless client 1310 did not match that of reference device type 10510 for RSS chart 1000, or if the client device type or wireless client 1310 could not be determined, localization module 2220 could proceed to compare the RSS of wireless packets 1310 against the reference signal strengths of the other RSS charts, such as said second RSS chart, and thereby try to ascertain the location of wireless client 1310.

Training module 2300 can also be configured to generate RSS charts for different reference bitrates. In the present example of FIGS. 10-11, the bitrates at which reference device type 10510 can transmit reference wireless packets 10511 can vary, such that not all of reference wireless packets 10511 are transmitted at the same bitrate. RSS chart 10000 comprises entries for reference signal strengths 11150 from reference wireless packets 10511 of corresponding different reference bitrates (labeled BR-1 and BR-2). Thus, RSS vector entries for bitrate BR-1 in RSS chart 10000 comprise a first RSS chart with respect to bitrate BR-1, and RSS vector entries for bitrate BR-2 in RSS chart 10000 comprise a second RSS chart with respect to bitrate BR-2.

As previously described, to locate wireless client 1310 at business locale 1900 (FIG. 1), scanning module 2210 can be configured to determine the client device type and the bitrate of wireless packets 1311 of wireless client 1310. Localization module 2220 can thus use such information to narrow or focus its comparison of wireless packets 1311 against such first or second RSS charts of RSS chart 10000 to localize wireless client 1310.

For instance, if the client device type of wireless client 1310 (FIG. 1) corresponds to the reference device type of RSS chart 10000 (FIG. 11), localization module 2220 can compare the bitrate of wireless packets 1311 (FIG. 1) against the different bitrates of the RSS vector entries in RSS chart 10000 (FIG. 11). Thus, if the bitrate of wireless packets 1311 correlates to bitrate BR-1, localization module 2220 can proceed to ascertain the location of wireless client 1310 based on a comparison between the RSS of wireless packets 1311 against the reference signal strengths for bitrate BR-1 in RSS chart 10000 (FIG. 1). Similarly, if the bitrate of wireless packets 1311 correlates to bitrate BR-2, localization module 2220 can proceed to ascertain the location of wireless client 1310 based on a comparison between the RSS of wireless packets 1311 against the reference signal strengths for bitrate BR-2 in RSS chart 10000 (FIG. 11).

Training module 2300 can also be configured to generate RSS charts for different reference frequency channels. In the present example of FIGS. 10-11, the frequency channels at which reference device type 10510 can transmit reference wireless packets 10511 can vary, such that not all of reference wireless packets 10511 need be transmitted at the same frequency channel. RSS chart 10000 comprises entries for reference signal strengths 11150 from reference wireless packets 10511 of corresponding different reference frequency channels (labeled FC-1 and FC-2). Thus. RSS vector entries for frequency channel FC-1 in RSS chart 10000 comprise a first RSS chart with respect to frequency channel FC-1, and RSS vector entries for frequency channel FC-2 in RSS chart 10000 comprise a second RSS chart with respect to frequency channel FC-2.

As previously described, to locate wireless client 1310 at business locale 1900 (FIG. 1), scanning module 2210 can be configured to determine the client device type and the frequency channel of wireless packets 1311 of wireless client 1310. Localization module 2220 can thus use such information to narrow or focus its comparison of wireless packets 1311 against such first or second RSS charts of RSS chart 10000 to localize wireless client 1310.

For instance, if the client device type of wireless client 1310 (FIG. 1) corresponds to the reference device type of RSS chart 10000 (FIG. 1), localization module 2220 can compare the frequency channel of wireless packets 1311 (FIG. 1) against the different frequency channels of the RSS vector entries in RSS chart 10000 (FIG. 11). Thus, if the frequency channel of wireless packets 1311 correlates to frequency channel FC-1, localization module 2220 can proceed to ascertain the location of wireless client 1310 based on a comparison between the RSS of wireless packets 1311 against the reference signal strengths for frequency channel FC-1 in RSS chart 10000 (FIG. 11). Similarly, if the frequency channel of wireless packets 1311 correlates to frequency channel FC-2, localization module 2220 can proceed to ascertain the location of wireless client 1310 based on a comparison between the RSS of wireless packets 1311 against the reference signal strengths for frequency channel FC-2 in RSS chart 10000 (FIG. 11).

Training module 2300 can also be configured to generate RSS charts with respect to both different reference frequency channels and different reference bitrates. In the present example of FIGS. 10-11, RSS chart 10000 comprises entries for reference signal strengths 11150 from reference wireless packets 10511 of corresponding different reference bitrates (labeled BR-1 and BR-2) and different reference frequency channels (labeled FC-1 and FC-2). Thus, (a) RSS vector entries for bitrate BR-1 and frequency channel FC-1 in RSS chart 10000 comprise a first RSS chart, (b) RSS vector entries for bitrate BR-2 and frequency channel FC-2 in RSS chart 10000 comprise a second RSS chart, (c) RSS vector entries for bitrate BR-1 and frequency channel FC-2 in RSS chart 10000 comprise a third RSS chart, and (d) RSS vector entries for bitrate BR-2 and frequency channel FC-1 in RSS chart 10000 comprise a fourth RSS chart.

As previously described, to locate wireless client 1310 at business locale 1900 (FIG. 1), scanning module 2210 can be configured to determine the client device type, the bitrate, and the frequency channel of wireless packets 1311 of wireless client 1310. Localization module 2220 can thus use such information to narrow or focus its comparison of wireless packets 1311 against such first, second, third, or fourth RSS charts of RSS chart 10000 to localize wireless client 1310.

For instance, if the client device type of wireless client 1310 (FIG. 1) corresponds to the reference device type of RSS chart 10000 (FIG. 11), localization module 2220 can compare the bitrate of wireless packets 1311 (FIG. 1) against the different bitrates of the RSS vector entries in RSS chart 10000 (FIG. 11), and can compare the frequency channel of wireless packets 1311 (FIG. 1) against the different frequency channels of the RSS vector entries in RSS chart 10000 (FIG. 11).

Thus, if the bitrate of wireless packets 1311 correlates to bitrate BR-1, and the frequency channel of wireless packets 1311 correlates to frequency channel FC-1, localization module 2220 can proceed to ascertain the location of wireless client 1310 based on a comparison between the RSS of wireless packets 1311 against the reference signal strengths corresponding to both bitrate BR-1 and frequency channel FC-1 in the first RSS chart of RSS chart 10000 (FIG. 11).

Similarly, if the bitrate of wireless packets 1311 correlates to bitrate BR-2, and the frequency channel of wireless packets 1311 correlates to frequency channel FC-2, localization module 2220 can proceed to ascertain the location of wireless client 1310 based on a comparison between the RSS of wireless packets 1311 against the reference signal strengths corresponding to both bitrate BR-2 and frequency channel FC-2 in the second RSS chart of RSS chart 10000 (FIG. 11).

Similarly, if the bitrate of wireless packets 1311 correlates to bitrate BR-1, and the frequency channel of wireless packets 1311 correlates to frequency channel FC-2, localization module 2220 can proceed to ascertain the location of wireless client 1310 based on a comparison between the RSS of wireless packets 1311 against the reference signal strengths corresponding to both bitrate BR-1 and frequency channel FC-2 in the third RSS chart of RSS chart 10000 (FIG. 11).

Similarly, if the bitrate of wireless packets 1311 correlates to bitrate BR-2, and the frequency channel of wireless packets 1311 correlates to frequency channel FC-1, localization module 2220 can proceed to ascertain the location of wireless client 1310 based on a comparison between the RSS of wireless packets 1311 against the reference signal strengths corresponding to both bitrate BR-2 and frequency channel FC-1 in the fourth RSS chart of RSS chart 10000 (FIG. 11).

Moving on, FIG. 12 illustrates a flowchart for a method 12000 of for providing a wireless transaction system. In some implementations, the wireless transaction system can be similar to transaction system 1000 as described above with respect to FIGS. 1-11.

Method 12000 comprises block 12100 for providing a client ID module. In some embodiments, the client ID module can be similar to client ID module 1200 (FIG. 2). The client ID module of block 12100 can comprise in some implementations a channel switching module (which can be similar to channel switching module 2230 (FIG. 2) as described above), a scanning module (which can be similar to scanning module 2210 (FIG. 2) as described above), and/or a localization module (which can be similar to localization module 2220 (FIG. 2) as described above).

Method 12000 can also optionally comprise blocks 12200 and/or block 12300. Block 12200 can comprise providing a training module, which can be similar in some embodiments to training module 2300 (FIG. 2) as described above. Block 12300 can comprise providing a point of service module, which can be similar in some embodiments to POS module 1100 (FIGS. 1-2) as described above.

FIG. 13 illustrates a flowchart for a method 13000 for transacting with wireless clients via a transaction system. In some examples, the transaction system can be similar to transaction system 1000 as described above with respect to FIGS. 1-12. In the same or other examples, the wireless clients can be similar to wireless clients 1300 (FIG. 1) as also described above.

Method 13000 can comprise block 13100 for generating, with a training module, a first signal strength chart of a portion of a business locale. In some examples, the training module can be similar to training module 2300 (FIG. 2) of transaction system 1000, while the signal strength chart can be similar to signal strength chart 10000 (FIGS. 10-11) or variations thereof. Similarly, the business locale can be similar to business locale 1900 (FIGS. 1, 10), or another business locale for which wireless client localization is desired. Block 13100 can be optional in some implementations.

Block 13200 of method 13000 comprises scanning, via a scanning module, a wireless channel set at the business locale for wireless signals of a registered customer set. In some examples, the scanning module can be similar to scanning module 2230 (FIG. 2) as described above. The wireless channel set, the wireless signals, and the registered customer set can be respectively similar to wireless channel set 1600, to the wireless signals of wireless clients 1300, and to registered customer set 2251 as described above with respect to FIGS. 1-2 and the different implementations of transaction system 1000 (FIGS. 1-11).

Block 13300 of method 13000 comprises identifying via the scanning module, out of the wireless signals, first wireless packets of a first client of the registered customer set. For example, the first wireless packets of the first client can be similar to wireless packets 1311 of wireless client 1310, as illustrated above in FIG. 1 and as described with respect to transaction system 1000 (FIGS. 1-11).

Method 13000 also comprises block 13400 for calculating, via the scanning module, a first client signal strength of the first wireless packets. The first client signal strength can be similar to the RSS of one or more packets of wireless packets 1311 of wireless client 1310 (FIG. 1), as described with respect to transaction system 1000 (FIGS. 1-11).

Method 13000 further comprises block 13500 for calculating, via a localization module, whether the first client is at a transaction area of the business locale based on the first client signal strength. The localization module can be similar to localization module 2220 (FIG. 2) in some examples, and the calculation of whether the first client is at the transaction area of the business local can be similar to one or more of the different calculations by localization module 2220 with respect to determining whether wireless client 1310 and/or 1320 is located at transaction area 1910 of business locale 1900 (FIG. 1) as described with respect to transaction system 1000 (FIGS. 1-11).

Block 13600 of method 13000 comprises presenting a user interface to a user at the transaction area via a POS module, the user interface comprising a first payment option correlated to the first client when the localization module calculates that the first client is at the transaction area. The POS module and the user interface can be respectively similar to POS module 1100 and user interface 1110 (FIGS. 1, 2) in some embodiments, while the first payment option can be similar to transaction option 6511 (FIGS. 6, 9) correlated to wireless client 1310 (FIG. 1) as describes above with respect to transaction system 1000 (FIGS. 1-11).

In some examples, one or more of the different blocks of methods 12000 or 13000 can be combined into a single block or performed simultaneously, and/or the sequence of such blocks can be changed. For example, blocks 12100 and 12300 of method 12000 can be performed simultaneously, such as where the client ID module and the point of service module are comprised by a single unit. In the same or other examples, some of the blocks of methods 12000 or 13000 can be subdivided into several sub-blocks. For example, block 13500 of method 13000 can be subdivided into further sub-blocks, such as a sub-block for correlating the first client signal strength against the first signal strength chart generated by the training module of block 13100, such as described above with respect to the correlation of the RSS of wireless packets 1311 (FIG. 1) with the reference signal strengths 11150 of RSS chart 10000 (FIGS. 10-11). There can also be examples where methods 12000 or 13000 can comprise further or different blocks. As an example method 13000 can comprise an additional block for emitting a payment confirmation request to the first client when the first payment option is selected by the user, as described above with respect to payment confirmation request 7510 and payment authentication 7520 (FIG. 7). In addition, there may be examples where methods 12000 or 13000 can comprise only part of the steps described above. For instance, block 13100 can be optional in some implementations of method 13000. Other variations can be implemented for methods 12000 or 13000 without departing from the scope of the present disclosure.

Although the wireless client transaction systems related methods herein have been described with reference to specific embodiments, various changes may be made without departing from the spirit or scope of the present disclosure. For example, there can be situations where training module 2300 may not be available or where it may not be otherwise feasible to build a radio fingerprint such as described above with respect to RSS chart 10000 (FIGS. 10-11). As an alternative, localization module 2220 (FIG. 2) may rely on a direct comparison between the RSS of the wireless packets of the different wireless clients 1300 present at business locale 1900 (FIG. 1), and ascertain that the one with the greatest RSS is at or closest to transaction area 1910 as described above. As another alternative, localization module 2220 (FIG. 2) may predict RSS at various locations using an RF propagation model, such as the log-distance path loss model. Other model-based techniques can be used as well by localization module 2220 instead of RSS chart 10000 generated as described above by training module 2220, such as a ray-tracing model or a Bayesian hierarchical approach.

Several other examples of such possible changes have been given in the foregoing description. Other permutations of the different embodiments having one or more of the features of the various figures are likewise contemplated. Accordingly, the disclosure herein is intended to be illustrative of the scope of the invention and is not intended to be limiting. It is intended that the scope of this application shall be limited only to the extent required by the appended claims.

The wireless client transaction systems related methods discussed herein may be implemented in a variety of embodiments, and the foregoing discussion of certain of these embodiments does not necessarily represent a complete description of all possible embodiments. Rather, the detailed description of the drawings, and the drawings themselves, disclose at least one preferred embodiment, and may disclose alternative embodiments.

All elements claimed in any particular claim are essential to the embodiment claimed in that particular claim. Consequently, replacement of one or more claimed elements constitutes reconstruction and not repair. Additionally, benefits, other advantages, and solutions to problems have been described with regard to specific embodiments. The benefits, advantages, solutions to problems, and any element or elements that may cause any benefit, advantage, or solution to occur or become more pronounced, however, are not to be construed as critical, required, or essential features or elements of any or all of the claims, unless such benefits, advantages, solutions, or elements are expressly stated in such claims.

Moreover, embodiments and limitations disclosed herein are not dedicated to the public under the doctrine of dedication if the embodiments and/or limitations: (1) are not expressly claimed in the claims; and (2) are or are potentially equivalents of express elements and/or limitations in the claims under the doctrine of equivalents. 

The invention claimed is:
 1. A method for transacting with wireless clients, the method comprising: receiving wireless packets from a plurality of client devices using a wireless radio; calculating, based on the received wireless packets, a signal strength associated with the received wireless packets and values for a set of characteristics associated with the received wireless packets; generating a set of one or more signal strength charts comprising expected signal strengths for at least first and second regions of a location, wherein the expected signal strengths for the first and second regions for a first value of a first characteristic differ from the expected signal strengths for the first and second regions for a different second value of the first characteristic; localizing a set of one or more client devices of the plurality of client devices to determine locations for the set of client devices, wherein localizing is based on the calculated signal strength of wireless packets received from each of the set of client devices, the values for the set of characteristics, and the set of signal strength charts; identifying at least one target client device of the set of client devices based on the determined locations of the set of client devices; and providing, over a wireless network to the target client device, a transaction graphical user interface (GUI) to be displayed at the target client device.
 2. The method of claim 1, wherein receiving the wireless packets comprises scanning a set of one or more wireless channels to capture the wireless packets.
 3. The method of claim 2, wherein scanning the set of wireless channels comprises: determining high-traffic channels of the set of wireless channels that are most heavily used by the plurality of client devices; and scanning each channel of the set of wireless channels in a probabilistic weighted order such that the high-traffic channels are scanned for the wireless signals more repeatedly than lower-traffic channels.
 4. The method of claim 1, wherein the values for the set of characteristics comprise at least one of a MAC address and a device unique identifier, wherein the values are used to determine whether the wireless packet is from a client device associated with a registered user, wherein the transaction interface is only provided to client devices associated with a registered user.
 5. The method of claim 4, wherein the device unique identifier comprises at least one of a media access control address and an extended unique identifier address.
 6. The method of claim 2, wherein scanning the set of one or more wireless channels for wireless packets comprises parsing the first wireless packets to identify the values for the set of characteristics.
 7. The method of claim 1, wherein localizing the set of one or more client devices comprises comparing the signal strength of the set of packets with the expected signal strengths for the first and second regions for a first value.
 8. The method of claim 1, wherein the first and second values are one of different device types, different bit rates, and different frequency channels.
 9. The method of claim 1, wherein the set of signal strength charts comprise expected signal strengths for different combinations of values for a plurality of different characteristics, wherein determining the location of a particular client device is based on the particular values for the plurality of characteristics associated with the received wireless packets from the particular client device.
 10. The method of claim 1 further comprising generating the set of signal strength charts based on reference wireless packets received from reference devices.
 11. The method of claim 1, wherein the signal strength of the wireless packets is calculated as an aggregate statistic for wireless packets received over a period of time from each client device.
 12. The method of claim 11, wherein the aggregate statistic comprises at least one of a number of frequency channels used, a number of packets transmitted, and an aggregate signal strength.
 13. The method of claim 11, wherein the aggregate statistic is an aggregate signal strength, wherein the aggregate signal strength is selected from the group consisting of a signal strength mean, a signal strength variance, a signal strength median, and a signal strength quartile.
 14. The method of claim 11, wherein the aggregate statistic is calculated based on a time-weighted standard where, with respect to the period of time, wireless packets received later in the period of time are weighted more heavily than wireless packets received earlier in the period of time.
 15. The method of claim 11, wherein the aggregate statistic is calculated using at least one model selected from the group consisting of a log-distance path loss model; a ray-tracing model; and a Bayesian hierarchical model.
 16. The method of claim 1, wherein providing the transaction GUI comprises: determining that a first client device and a second client device are located in a same region of the location; providing a GUI with a first option for a user to self-identify at the first client; providing a GUI with a second option for the user to self-identify at the second client; receiving self-identification information from the first client; and providing the transaction GUI for performing a transaction at the first client.
 17. A system comprising: a computer comprising: a set of one or more processors; a wireless radio; and a memory for storing a transaction application for transacting with wireless clients, wherein the transaction application, when executed by the set of processors, causes the set of processors to: receive wireless packets from a plurality of client devices using the wireless radio; calculate, based on the received wireless packets, a signal strength associated with the received wireless packets and values for a set of characteristics associated with the received wireless packets; generate a set of one or more signal strength charts comprising expected signal strengths for at least first and second regions of a location, wherein the expected signal strengths for the first and second regions for a first value of a first characteristic differ from the expected signal strengths for the first and second regions for a different second value of the first characteristic; localize a set of one or more client devices of the plurality of client devices to determine locations for the set of client devices, wherein localizing is based on the calculated signal strength of wireless packets received from each of the set of client devices, the values for the set of characteristics, and the set of signal strength charts; identify at least one target client device of the set of client devices based on the determined locations of the set of client devices; and provide, over a wireless network to the target client device, a transaction graphical user interface (GUI) to be displayed at the target client device.
 18. The system of claim 17, wherein the transaction application causes the set of processors to localize the set of client devices by comparing the signal strength of the set of packets with the expected signal strengths for the first and second regions for a first value.
 19. The system of claim 17, wherein the first and second values are one of different device types, different bit rates, and different frequency channels.
 20. The system of claim 17, wherein the set of signal strength charts comprise expected signal strengths for different combinations of values for a plurality of different characteristics, wherein the transaction application causes the set of processors to determine the location of a particular client device based on the particular values for the plurality of characteristics associated with the received wireless packets from the particular client device. 